Feedeeick celce



' UNITED STATES ljrirnivfr QFFICE.

Financieren cELcE, or. HoLYoKE, MASSACHUSETTS.

Bio LT.

SPEIFICATON forming part of Letters Patent N o. 380,184,7dated March 27, 1888.

` Application filed Deecmberd, 1887. Serial No. 256,974. (No model.) I

.To all whom it may concerlal the body thereof, and 3 a head fixed on one Y Beitknown that I, FREDERICK CELCE, acitiend of said body either integral therewith or zen of the United States, residing at Holyoke, otherwise. Said bolt, as shown in Fig. 1, is in the countyof Hampden and State of Massa` constructed to receive a nut, 7, (see Fig. 4,)

chusetts, haveinvcnted'- new and useful Imon its shank 4, whereby the bolt is connected 55 proveniente in Longitudinal'ly-Elastic Bolts, to the blades or shears or other vibrating bars f of which the following is a specification. or joint parts. Figs. 2 and 5 illustrate con- This invention relates to joint or pivot bolts structions of said bolts in which a screw, 6, for various mechanical structures, as hereinhaving one end screwing into the end of said Io after set forth, the object being to provide an bolt, provides a substitute for the nut 7,` said 6o improved boltfor uniting the blades of shears screw being preferable to said nut in joint conor other objects having similar vibrating memstructions requiring only a limited-compresbers or action to which it is desirable to imsion of the united parts. .The body 2 of ksaid part a certain degree of elastic frictional rebolt` is perforated longitudinally, .forming a 15 sistance-at their point of pivotal connection; chamber, o, therein,whereby said bodyis m'ade 65 and the invention consists in the peculiar contubular, and said shank -4is screw-threaded struction of said bolt, all as hereinafterv fully loutwardly when the nut 7 is`usedv and interdescribed, and pointed out in the claim. nally when thescrew is employed. Theabove r In the drawings forming part of this speciiidescribed qualities of longitudinal elongation 'i 2c cation, Figure l is a perspective view of a and retraction are'imparted to said bolt-body 7o joint or pivot bolt constructed according to my 2 by forming therein the spiral groove a, which invention. Fig. 2 is a longitudinal section of is cut through the Walls of said body, thereby r portions of two bars havingapplied thereto a forming between the head 3 and the opposite pivot-bolt embodying my improvements, said end ofthe body2 substantiallyavolutespring.

t 2'5 bolt and a washer attached thereto beingshown In applying said bolt as a uniting pivot for the l7 5 in section and the washer attaching screw in bars c and d, Figs. 2 and 4, and also for uniting side elevation. Fig. 3 is a plan view of the the blades 9 and 10 of shears, it is preferable washer Shown in Fig. 2 and ofthe end of said to form the Shank 4.of said bolt with ilattened bolt. Fig. 4 represents, also, a longitudinal sides, as shown in Fig. 3, andto providein one y section of portions of two united bars, but of said bars or blades a perforation, as x, Fig. 8o

showing said pivot-bolt in side elevation and 6, having two parallel sides, to receive the said 1 provided -witha nut on its neck instead of a end of the bolt-shank, so that when the shearscrew-entering the end thereof. Fig. 5 is a blades or said bars are given a vibratory moperspective view of the blades of a pair of tion the washer 5, which is interposed between shears (the handles being shown broken off) the head of the screw 6 or between the nut 7 85 united by said bolt, the washer being shown in and the side of the bare or the shear-blade 9, section. Fig. 6 is a section of one of the shearwill have such reciprocating rotary motion as blades shown in Fig. 5. may be imparted to the bolt, thereby obviat- The essential object of this invention is to ingany'danger that said screw or nut may be 40 provide a joint or pivot bolt which of itself is loosened bythe operation of said bars or blades. 9o L capable o f longitudinal elongation and retrac- In fitting said bolt to act as a pivot-connection tion, whereby the use of a spring or springs, between two bars or blades the perforations in in connection with a joint or pivot bolt as a the latter,`which receive the body of the bolt, separate element whereby the parts united by are made of slightly greater length than said said bolt are so yieldingly connected that the body, as at z, Figari, in order to allow for the 95 adjoining surfaces thereof have a certain deelongation of said body when the nut 7 or the gree of frictional resistance imparted thereto, screw 6 are either one of them operated to draw is obviated. I said bars or blades into closer contact with each Fig. l illustrates said improvedjoint and other, the said volute spring, constructed as 5o pivot bolt in perspective view, of which 2 is described, in the body ofthe bolt itself lby its Ico ansion serving to eiect such degree of fricvtonal contact of said bars as may be desired rithout the employment of any other spring han that above mentioned.

The withindescribed bolt, comprising within tself the qualities of longitudinal elongation .nd retraction, is made, preferably,of steel and `uitably tempered, and is applicable to a va- Iiety of uses other than those above specifiedis, for instance, as ay bolt for uniting thill- :ouplings,whereby the latter are by the spring )f the bolt prevented from rattling, as a bolt ;o be used for similar purposes on various parts of carriage-Work and for connecting the ends of elliptic and other springs, and for use on machinery Where it is desirable that a bolt set forth.

FREDERCKA CELCE.

Witnesses G. M. CHAMBERLAIN,

H. -A. CHAPIN, 

